Mechanical movement



(N0 Model.)

G. W. AMOS. MEOHANICAL MOVEMENT.

No. 476,112. Patented May '31, 1892,

ATTEST: |NVENTOR:

. Cz'eai fflmos, 55 r UNITED STATES PATENT GEORGE W. AMOS, OF CHICAGO, ILLINOIS.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 476,112, dated May 31, 1892.

Application filed January 12, 1891. Serial No. 377,534. (No model.)

clear, and exact description of the same, refer-1f.

ence being had to the accompanying drawings, forming a part of this specification, and in Which-- Figure 1 is a detail side elevation illustrating my present invention adapted for use on a type-writing machine; Fig. 2, a detail crosssection at line a: m; Fig. 3, a detail sectional plan at line m 00'; Fig. 4, an enlarged detail elevation of the motion-reversing mechanism proper.

Similar numerals of reference indicate like parts in the several views.

The invention mainly relates to a motionreversing mechanism in which a reciprocating movement is converted into a step-by-step reciprocating semi-rotary movement, the present invention being more especially adapted for use in type-writing machines for imparting a step-by-step lateral reciprocating motion to the ink-ribbon carrier in addition to the usual step'by-step motion of the ribbon in a longitudinal direction.

Referring to the drawings, 1 represents the table or top plate of the type-writing machine, upon which the paper-carriage is arranged to move in any usual manner and to which the type-bars are pivoted in the usual way; 2,the base of the machine, and 3 one of the series of key-bars by which the type-levers are operated.

4 represents one of the ink-ribbon spools, the non-rotary supporting-shaft 5 of which is arranged to have an endwise movement in its movement is imparted to the ink-ribbon-carrying spools consists of the following parts:

8 is a ratchet-sector supported on a suitable shaft 9 and provided on its face with a pair of pins or studs 10 and 11.

12 is a reversible dog pivoted to an oscillating arm 13, journaled on the shaft 9. The reversible or double-pointed dog 12 is provided with a centrally-arranged inwardly-projecting finger 13' in the circular path of the pins or studs 10 and 11, so that in the step-bystep movement of the ratchet-sector by one of the points of the aforesaid dog one of the studs will be brought in contact with the finger 13 to reverse the dog and bring its other point into action to impartareverse step-bystep motion to the ratchet-sector.

The dog 12 is spring-held in either of its two positions by means of a spring-plunger 14, acting against the respective faces of the centrally-arranged V-shaped projection 15 on the dog, as clearly illustrated in Fig. 4:

For use in type-writing machines the sector-shaft 9 will be arranged in a transverse direction in suitable bearings on the frame of the machine, and at each end will be provided with a crank-arm 16, that is connected by suitable link 17 or equivalent means with the nonrotary shaft of the ink-ribbon spool on either side of the machine. Motion is communicated to the operating oscillating arm 13 bya link 18, arm 19, rock-shaft 20, arm 21, and link 22, connected to a transversely-arranged bar 23, located underneath the series of keybars 3, so as to be depressed by the downward movement of any one of said key bars, a return motion in an upward direction being imparted to the parts by a suitable spring, (not shown,) as usual in type-Writer attachments that are operated by the key-levers.

In the present invention a step-by-step motion is communicated to the ink-ribbon in a longitudinal direction on the completion of each lateral movement of its shaft, as above described, by the following improved arrange ment of parts:

24 is a springactuated arm journaled on the non-rotary shaft 5 and carrying at its free end a spring-pawl 25, that engages the circular ratchet formation 26 on one of the rims of the ink-ribbon spools. The extreme free end of this arm travelsin the path of the end 0b of the machine, so as to be pushed out laterally as the inleribbon carrier, with which it moves,

nears the end of its endwise reciprocation, such lateral movement of the arm 24 imparting through the spring-pawl 25 a movement of one or more ratchet-teeth, as described, to the carrying-spool 4 and the ink-ribbon connected therewith.

28 is a pivoted cam-finger on the arm 24 for holding the spring-pawl 25 out of operative position, when desired, by riding under a lateral projection on the side of the pawl, so as to support in a raised position away from the ratchet-wheel 26, the purpose being to admit of the spool that is unwinding its portion of the ink-ribbon being disengaged from its spring-pawl while the spool that is winding up the ribbon is in engagement and receiving the step-by-step motion in the manner heretofore described.

29 is an upwardly-extending bent arm or carrier upon the shaft 5, over which the inkribbon passes to be in proper position over the type-well of the machine.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of the ratchet-sector 8, having pins or studs 10 and 11, the shaft 9, oscillating arm 13, journaled on the shaft, and the double-pointed reversible dog 12, having an inwardly-projecting finger 13, essentially as herein set forth.

2. The combination of the ratchet-sector 8, having pins or studs 10 and 11, the shaft 9, oscillating arm 13, journaled on the shaft, the doublepointed reversible dog 12, provided with an inwardly-projecting finger 13 and a V- shaped projection 15, both centrally arranged, and the spring-plunger 14 on the arm 13, essentially as set forth.

3. The combination of the ratchet-sector 8, having pins or studs 10 and 11, the shaft 9, oscillating arm 13, journaled on the shaft, the double-pointed reversible dog 12, provided with an inwardly-projecting finger 13, the arms 16, the non-rotary shafts 5, carrying the ink-ribbon spools 4, and means for imparting a vibratory motion to the arm 13, essentially as herein set forth.

4. The combination of the ratchet-sector 8, having pins or studs 10 and 11, the shaft 9, oscillating arm 13, journaled on the shaft, the double-pointed reversible dog 12, provided wit-h an inwardly-projecting finger 13, the arm 16, the non-rotary shafts 5, having stop-collars 6 and spring-fingers 7, the ink-ribbon spools 4, and means for imparting a vibratory motion to the arm 13, essentially as herein described.

5. The combination, with the endwise reoiprocating non-rotary shaft 5, carrying the ink-ribbon spool and the arm 24, of the arm 24, carrying a pawl 25, engaging the ratchetrim 26 of the spool, and the fixed cam-plate 27, having at each end oblique cam-operating faces adapted to operate said arm, substantially as herein set forth.

In testimony whereof witness my hand this 10th day of January, 1891.

GEORGE WV. AMOS. 

